Weatherproofing Other Window Types

For sliding windows you will want to attach metal V-channels to the windows where the sash fits. You will also want to attach reinforced felt around the remaining three sides of the sash. Use a tubular gasket to seal the gap where the sashes meet.

If you have casement windows, you will want to attach self-adhesive, foam compression strips around the window stops on all four sides of the sash. Remember that self-adhesive strips won't stick if the surface is too cold (about 50 degrees F). If that is a consideration, be sure to substitute high-quality neoprene strips.